OPU frame generating device and OPU frame test device

Abstract

An OPU frame generating device includes a frequency setting unit that sets a frequency corresponding to a bit rate of data which can be stored in a payload area, a parameter calculating unit that calculates a parameter C m indicating an integer part of the amount of data included in the payload area using the set frequency, a data inserting unit that outputs a timing signal determined by the parameter C m and inserts data at a position determined by the parameter C m in the payload area, a data generating unit that generates data in synchronization with the timing signal, and a frame generating unit that generates an OPU frame having the payload area into which the data is inserted.

The invention claimed is: 
     
       1. An Optical channel Payload Unit (OPU) frame device comprising:
 a frame generating unit that generates an OPU frame having a payload area; 
 a second oscillating unit that generates a second clock signal for driving the frame generating unit; 
 a frequency setting unit that sets an arbitrary frequency corresponding to a bit rate of data which can be stored in the payload area; 
 a parameter calculating unit that calculates a parameter C m  indicating an integer part of an amount of data included in the payload area using the arbitrary frequency set by the frequency setting unit; 
 a data inserting unit that outputs a timing signal determined by the parameter C m  calculated by the parameter calculating unit and inserts data at a position determined by the parameter C m  in the payload area; and 
 a data generating unit that generates data in synchronization with the timing signal and outputs the generated data to the data inserting unit, 
 wherein the frame generating unit generates the OPU frame having the payload area into which the data has been inserted by the data inserting unit, 
 the second clock signal drives the parameter calculating unit and the data inserting unit, in addition to the frame generating unit, 
 the frequency setting unit sets an arbitrary frequency range corresponding to the bit rate of the data which can be stored in the payload area and sequentially changes the arbitrary frequency in the set arbitrary frequency range, 
 the parameter calculating unit sequentially calculates the parameter C m  using the frequency which is sequentially changed, 
 the data inserting unit acquires the parameter C m  which is sequentially calculated from the parameter calculating unit, sequentially generates the timing signal using the parameter C m  which is sequentially calculated and inserts the generated data with a common frequency from the data generating unit at a position determined by the acquired parameter C m  in the payload area, and 
 the data generating unit sequentially generates data in synchronization with the timing signal which is sequentially changed. 
 
     
     
       2. The OPU frame device according to  claim 1 ,
 wherein the data generating unit generates a predetermined pattern of data. 
 
     
     
       3. The OPU frame device according to  claim 1 , further comprising:
 a data acquiring unit that acquires data included in the payload area of the OPU frame from a receiving unit which receives the OPU frame generated by the frame generating device; 
 a determining unit that determines whether the data acquired by the data acquiring unit is identical to the data generated by the data generating unit; and 
 a display unit that displays the determination result of the determining unit. 
 
     
     
       4. An Optical channel Payload Unit (OPU) frame generating device comprising:
 a frame generating unit that generates an OPU frame having a payload area; 
 a second oscillating unit that generates a second clock signal for driving the frame generating unit; 
 a frequency setting unit that sets an arbitrary frequency corresponding to a bit rate of data which can be stored in the payload area; 
 a first oscillating unit that generates a first clock signal at the arbitrary frequency set by the frequency setting unit; 
 a data generating unit that generates data in synchronization with the first clock signal; 
 a parameter calculating unit that calculates a parameter C m  indicating an integer part of an amount of data included in the payload area using the arbitrary frequency of the first clock signal; 
 a data inserting unit that inserts the data generated by the data generating unit at a position determined by the parameter C m  which is calculated by the parameter calculating unit in the payload area; and 
 a buffer that adjusts timing of the data generated by the data generating unit so as to be synchronized with a time when the data inserting unit inserts the generated data, 
 wherein the frame generating unit generates the OPU frame having the payload area into which the generated data is inserted by the data inserting unit, 
 the second clock signal drives the parameter calculating unit and the data inserting unit, in addition to the frame generating unit, 
 the frequency setting unit sets an arbitrary frequency range corresponding to the bit rate of the data which can be stored in the payload area and sequentially changes the arbitrary frequency of the first clock signal in the set arbitrary frequency range, 
 the data generating unit sequentially generates data in synchronization with the first clock signal which is sequentially changed, 
 the parameter calculating unit sequentially calculates the parameter C m  using the arbitrary frequency of the first clock signal which is sequentially changed, and 
 the data inserting unit acquires the data generated by the data generating unit which has the same frequency as that of the first clock signal and the parameter C m  calculated by the parameter calculating unit, and inserts the acquired data at a position determined b the acquired parameter C m  in the payload area. 
 
     
     
       5. An Optical channel Payload Unit (OPU) frame generating method comprising:
 a frame generating step of generating an OPU frame having a payload area; 
 a frequency setting step of setting an arbitrary frequency corresponding to a bit rate of data which can be stored in the payload area; 
 a data generating step of calculating a parameter C m  indicating an integer part of an amount of data included in the payload area using the arbitrary frequency set in the frequency setting step, generating data in synchronization with a timing determined by the calculated parameter C m , and inserting the generated data at a position determined by the calculated parameter C m  in the payload area; 
 an OPU frame transmitting step of transmitting the OPU frame generated by the frame generating step; 
 a data acquiring step of acquiring data included in the payload area of the OPU frame from a receiving unit which receives the OPU frame transmitted in the OPU frame transmitting step; 
 a determining step of determining whether the data acquired in the data acquiring step is identical to the data generated in the data generating step; and 
 a display step of displaying the determination result in the determining step, 
 wherein the frame generating step includes a step of generating the OPU frame having the payload area into which the data is inserted in the data generating step, 
 the frequency setting step sets an arbitrary frequency range corresponding to the bit rate of the data which can be stored in the payload area and, after the frame generating step, the frequency setting step sequentially changes the arbitrary frequency in the set arbitrary frequency range, 
 the data generating step sequentially calculates the parameter C m  using the arbitrary frequency which is sequentially changed, 
 the data generating step acquires the parameter C m  which is sequentially calculated, sequentially generates a timing signal using the parameter C m  which is sequentially calculated, and inserts the generated data with a common frequency at a position determined by the acquired parameter C m  in the payload area, and 
 the data generating step sequentially generates data in synchronization with the timing signal which is sequentially changed. 
 
     
     
       6. The OPU frame generating method according to  claim 5 ,
 wherein the data generating step generates a predetermined pattern of data. 
 
     
     
       7. A non-transitory computer readable medium having instructions that allows a computer to perform the entire method according to  claim 5 . 
     
     
       8. An Optical channel Payload Unit (OPU) frame generating method comprising:
 a frame generating step of generating an OPU frame having a payload area; 
 a frequency setting step of setting an oscillating frequency of a first oscillating unit to an arbitrary frequency corresponding to a bit rate of data which can be stored in the payload area; 
 a data generating step of generating data in synchronization with a first clock signal from the first oscillating unit, calculating a parameter C m  indicating an integer part of an amount of data included in the payload area using the arbitrary frequency of the first clock signal, in synchronization with a second clock signal from a second oscillating unit different from the first oscillating unit, and inserting the generated data at a position determined by the calculated parameter C m  in the payload area; 
 an OPU frame transmitting step of transmitting the OPU frame generated by the frame generating step; 
 a data acquiring step of acquiring data included in the payload area of the OPU frame from a receiving unit which receives the OPU frame transmitted in the OPU frame transmitting step; 
 a determining step of determining whether the data acquired in the data acquiring step is identical to the data generated in the data generating step; and 
 a display step of displaying the determination result in the determining step, 
 wherein the frame generating step includes a step of generating the OPU frame having the payload area into which the data is inserted in synchronization with the second clock signal, 
 the frequency setting step sets an arbitrary frequency range corresponding to the bit rate of the data which can be stored in the payload area, and after the frame generating step, the frequency setting step sequentially changes the oscillating frequency of the first oscillating unit in the arbitrary frequency range, 
 the data generating step sequentially generates data in synchronization with the first clock signal which is sequentially changed, 
 the data generating step sequentially calculates the parameter C m  using the arbitrary frequency of the first clock signal which is sequentially changed, and 
 the data generating step acquires the generated data which has the same frequency as that of the first clock signal and the calculated parameter C m , and inserts the acquired data at a position determined b the acquired parameter C m  in the payload area.